-ey c-- ccc cce cck cco ccp ce- cec cee cek ceo cep cey ckc cko cky co- coc coe cok coo cop coy cpc cpe cpk cpo cpp cyc cye cyk cyo cyp ec- ecc ece eck eco eec eee eek eeo eep eey ekc eke eko ekp eky eo- eoc eoe eok eoo eop ep- epc epe epo epp eyc eye eyo eyp kcc kce kck kcp ke- kec kee kek keo kep key kkc kke kkk kkp kky koc koe kok koo kop koy kpc kpe kpk kpo kpp kyc kye kyo kyp oc- occ ock oco ocp oec oee oeo oep oey okc oke okk oko okp oo- ooc ook ooo oop op- opc ope opk opo opp opy oye oyo p-p pcc pce pck pco pcp pec pee pek peo pep pey pkc pke pko pkp pky poc poe pok poo pop poy ppc ppe ppk ppo ppp py- pyc pye pyk pyo ycc yce yco ycp ycy yec yee yek yeo yep yey ykk yoc yoe yok yoo yop yoy ypo yyc yye yyy